Car-ventilator.



No. 853,935. PATENTBD MAY 14, 1907.

B RIEMBR GAR VENTILATOR. APPLIUATION IILED MAR. 15,1907. I

2 SHEETS-SHEET 1- ourran STATES PATENT orrroa.

FRANK RIEMER, OF DENVER, COLORADO, ASSIGNOR OF ONE-HALF TO EDWARD H. VOGT, OF DENVER, COLORADO.

CAR-VENTILATOR.

Specification of Letters Patent.

Patented. May 14, 1907.

Application filed March 15,1907. Serial Nm 362,452.

To and whom, it may concern:

Be it known that I, FRANK RIEMER, a citizen of the United States, residing at ,the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Car-Ventilators and I dodeclare the following to be a full clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in ventilators for cars and other structures where ventilationis needed. I

My improvement consists of means for automatically producing suction at the outer extremity of a conduit whose opposite extremity communicates with the interior of the car. The suction induced draws the foul air out of the car through the said con-- duit. Where the device is employed on cars, the suction-producing conduit has an open end pointing in the direction toward which the train is traveling. The motion of the train produces a strong draft through this conduit. The ventilating conduit intersects the suction-inducing conduit and the air from the latter passes around the ventilating conduit and by virtue of the peculiar construction of the outer extremity of the suction conduit, causes the air to rush with considerable force inwardly over the edge of the ventilating conduit in all directions, thus producing a partial vacuum at the outer ex tremity of the last named conduit whereby an outwardly directed current is induced through the ventilating conduit.

Having briefly outlined my improved construction, I will proceed to describe the same more in detail reference being made. to the accompanying drawing in which is illustrated an embodiment thereof.

In this drawing, Figure 1 is a top plan view of a car equipped with my improvements. Fig. 2 is a side elevation of the same the lower portion of the car being broken away. Fig. 3 is a section taken on the line 33 Fig. 1., the parts being shown on a larger scale. Fig. 4 is a section taken on the line 44 Fig. 3 showing the parts on a still larger scale.

The same reference characters indicate the same parts in all the views.

improved ventilating devices are locatedtwo of them being located in front and two in the rear. As shown in the drawing each ventilating device is of duplex construction and consists of a pair of elbow-shaped suction-inducing conduits 8 connected together and two ventilating conduits 9 each communicating at one'extremity with the interior of the car. These conduits 9 pass through the inner portion of the ventilating conduits and are sufficiently smaller in the said conduits, to allow considerable space for the circulation of air around the ventilating conduits.

The construction of the apparatus is best illustrated in Fig. 4. Each ventilating conduit 9 enters an opening in the outward bend of each suction conduit 8 and passing through the suction conduit terminates at the outlet extremity of the latter which is surrounded by a beveled or inwardly bent portion 10 whose edge terminates a short distance from the outer extremity of the ventilating conduit 9 whereby the space surrounding the conduit 9 within the conduit 8 is very much contracted, with the result that the air is driven with great force across the edge of the outer extremity of the conduit 9, thus producing a vacuum of considerable magnitude which results in the drawing of the foul or impure air out of the car in a manner that will be readily understood. It is evident that only half of each duplex structure is employed at a time since the duplex feature is adopted to produce the ventilating result when the car is traveling in both directions. For instance if the car is traveling in the direction indicated by the arrow a in. Fig. 4, the air will enter the ventilating conduit 8 at its forward extremity which is preferably covered by mesh material 12. The air entering the aforesaid end of the conduit 8 follows the direction indicated by the arrows and escapes around the outer extremity of the conduit 9. During this time the companion conduit 8 and its ventilating conduit 9 are not utilized to any considerable degree. It is true, however, that the motion of the train will cause more or less suction at the outer extremity of both conduits 9 but the special ventilating advantage is obtained by the entrance of the air at the forwardly directed end of the conduit member 8 whereby it is forced out of the beveled extremity 9 of the last named conduit around the ventilating conduit as heretofore explained. It is therefore evident that the two members of each duplex structure are alternately employed for producing the major ventilating result, depending upon the direction of the trains travel. As shown in the drawing two of these duplex structures are placed at the front end and two at the rear end of the car. It is evident that the number employed is immaterial so far as the invention is concerned, since a singe duplex structure embodies all the elements of the invention. The inner extremity of each ventilating conduit 9 is preferably provided with a mesh covering 13 to prevent flies and other insects from entering the car.

From the foregoing description the use and operation of my improved device will be readily understood. Assuming that the duplex ventilating structures are mounted as illustrated in the drawing, it is evident that the forwardly pointed suction members of each structure will be employed to their maximum capacity in producing the ventilating result during the travel of the train. It is also evident that when the train is travcling in the opposite direction, that the other suction members of the duplex structures will be forwardly directed thus alternating with the first named members as heretofore explained.

Having thus described my invention, what I claim is:

1. A ventilator for cars or other structures, comprising a suction member and a ventilating member, the suction member being open ended and so arranged that a draft of air will be automatically passed therethrough, and a ventilating conduit passed through the outlet extremity of the suction conduit, the latter surrounding the ventilating conduit and having its outer extremity bent inwardly whereby the space around the ventilating conduit is considerably contracted and the force of the air current correspondingly increased as it escapes from the suction conduit thus producing a vacuum pull at the outer extremity of the ventilating conduit, the latter communicating with the structure to be ventilated, substantially as described.

2. In a ventilating device for cars and other structures, comprising a duplex apparatus composed of a pair of open-ended suction elbow-shaped conduits whose inlet extremities are in alinement but pointed in op posite directions, and a ventilating conduit passing through the outlet extremity of each suction conduit, the ventilating conduit being considerable smaller than the suction conduit and the latter having its outer extremity inwardly bent whereby the space between the two conduits is contracted to increase the force of the air current as it escapes from the suction conduit around the outer extremity of the ventilating conduit, the inner extremities of the ventilating conduits communicating with the interior of the structure to be ventilated, substantially as described.

3. The combination with a car, of a ventilating structure mounted thereon, the same being composed of a suction conduit and a ventilating conduit, the suction conduit be.- ing elbow-shaped and having both extremities open, one extremity of the latter being forwardly directed, and a ventilating conduit intersecting the outlet extremity of the suction conduit at right angles to the length of the car, and passing through the outlet extremity of the ventilating conduit, the last named extremity of the latter being bent inwardly toward the ventilating conduit whereby the space between the two conduits is considerably contracted for the purpose set forth.

4. The combination with a car, of a duplex ventilating structure composed of two openended elbow-shaped suction members having oppositely directed alined portions extending lengthwise of the car, their other extremities being outwardly directed, both extremities of the said conduits communicating with the atmosphere, and a ventilating conduit intersecting the outlet portion of each suction conduit, one extremity of each ventilating conduit communicating with the interior of the car while its other extremity passes through the outlet portion of the suction conduit, the latter surrounding the ventilating conduit and having its outlet extremity bent inwardly whereby the space between the two conduits is considerably contracted to increase the force of the suction pull acting on the ventilating conduit, substantially as de' scribed.

In testimony whereof I al'lix my signal ure in presence of two witnesses.

FRANK RIEMER.

itnesses DENA NELsoN, MAY GAwLEY. 

